51125633 has 4 divisors (see below), whose sum is σ = 55058388. Its totient is φ = 47192880.

The previous prime is 51125629. The next prime is 51125639. The reversal of 51125633 is 33652115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3073009 + 48052624 = 1753^2 + 6932^2 .

It is a cyclic number.

It is not a de Polignac number, because 51125633 - 2² = 51125629 is a prime.

It is a super-2 number, since 2×51125633² = 5227660699301378, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51125639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1966358 + ... + 1966383.

It is an arithmetic number, because the mean of its divisors is an integer number (13764597).

Almost surely, 2^51125633 is an apocalyptic number.

It is an amenable number.

51125633 is a deficient number, since it is larger than the sum of its proper divisors (3932755).

51125633 is a wasteful number, since it uses less digits than its factorization.

51125633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3932754.

The product of its digits is 2700, while the sum is 26.

The square root of 51125633 is about 7150.2190875525. The cubic root of 51125633 is about 371.1472377855.

Adding to 51125633 its reverse (33652115), we get a palindrome (84777748).

The spelling of 51125633 in words is "fifty-one million, one hundred twenty-five thousand, six hundred thirty-three".